20808686632 has 16 divisors (see below), whose sum is σ = 40070782260. Its totient is φ = 10123144704.

The previous prime is 20808686623. The next prime is 20808686641. The reversal of 20808686632 is 23668680802.

It is an interprime number because it is at equal distance from previous prime (20808686623) and next prime (20808686641).

It can be written as a sum of positive squares in 2 ways, for example, as 20416408996 + 392277636 = 142886^2 + 19806^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35149513 + ... + 35150104.

Almost surely, 2^20808686632 is an apocalyptic number.

It is an amenable number.

20808686632 is a deficient number, since it is larger than the sum of its proper divisors (19262095628).

20808686632 is a wasteful number, since it uses less digits than its factorization.

20808686632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70299660 (or 70299656 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 20808686632 in words is "twenty billion, eight hundred eight million, six hundred eighty-six thousand, six hundred thirty-two".